That’s only in the super-yeshivish Kensetonian clans, where names need to be a minimun of 3 sylables (for those nebachs that were not crowned with 2-3 names).
In BP proper, Leah would be “Laychu” to Babby and Shvigger, and when listed on the “hostess” roll call. (sorry, Leah just doesn’t lend itself to Gangsta shprach)